Duns:As I previously said, these mayflies hatch in the calm, slow moving water of eddies, pockets behind boulders and in pockets along the banks of the stream. They hatch in the mornings, sometimes as early as 8:00-9:00 o'clock depending on the temperature.

Presentation:You want to make the same type presentations I suggested for the emerger imitations. Long, light leaders and tippets help fool the trout in the calmer water. For the most part, this is a matter of casting to a spot, picking the line up and casting to another likely spot. Getting a long drag free drift is about impossible if you place the fly in the type of water the Mahogany Duns hatch in.

Spinners:The male and female spinners look entirely different. The females are usually a rusty brown but the males have white or translucent looking abdomens. They fall very late in the afternoons and into the evenings. The spinner falls will occur after it is legal to fish in the park.